1. You cannot change the Google Voice CallerID. Google Voice only allows its own number to be sent.
2. Make the following changes:
Physical Interfaces -> Phone Port -> PrimaryLine : SP1 Service
Physical Interfaces -> Phone Port -> OutboundCallRoute:
{([1-9]x?*(Mpli)):pp},{(<#:>):li},{911:sp2},{**0:aa},{***:aa2},{(<**1:>(Msp1)):sp1},
{(<**2:>(Msp2)):sp2},{(<**8:>(Mli)):li},{(<**9:>(Mpp)):pp},{(Mpli):pli}
Service Providers -> ITSP Profile A -> General -> DigitMap:
(1xxxxxxxxxx|<1>[2-9]xxxxxxxxx|<**2>011xx.|xx.|(Mipd)|[^*]@@.)